Update main.py

main.py

@@ -26,7 +26,7 @@ sys.path.append(os.path.dirname(os.path.abspath(__file__)))
 from app.intro import display_intro_page
 from app.building_information import display_building_info_page
 from app.climate_data import display_climate_page
-from app.materials_library import display_materials_page, Material, GlazingMaterial, MaterialCategory
+from app.materials_library import display_materials_page, Material, GlazingMaterial, MaterialCategory, MaterialLibrary  # Added MaterialLibrary import
 from app.construction import display_construction_page, get_available_constructions
 from app.components import display_components_page
 from app.internal_loads import display_internal_loads_page
@@ -71,6 +71,11 @@ class BuildSustain:
         if 'current_page' not in st.session_state:
             st.session_state.current_page = "Intro"
         
+        # Initialize material library if not set (Added to support hvac_loads.py)
+        if 'material_library' not in st.session_state:
+            st.session_state.material_library = MaterialLibrary()
+            logger.info("Initialized MaterialLibrary in session state")
+        
         # Initialize project data structure if not set
         if 'project_data' not in st.session_state:
             st.session_state.project_data = {
@@ -115,7 +120,8 @@ class BuildSustain:
                     "hourly_data": [],
                     "epw_filename": "",
                     "typical_extreme_periods": {},
-                    "ground_temperatures": {}
+                    "ground_temperatures": {},
+                    "ground_reflectivity": 0.2  # Added for hvac_loads.py solar calculations
                 },
                 "materials": {
                     "library": dict(SAMPLE_MATERIALS),
@@ -149,15 +155,33 @@ class BuildSustain:
                         "hourly": [],
                         "peak": 0,
                         "summary_tables": {},
-                        "charts": {}
+                        "charts": {},
+                        "breakdown": {}  # Added to store detailed load components (e.g., conduction, solar)
                     },
                     "heating": {
                         "hourly": [],
                         "peak": 0,
                         "summary_tables": {},
-                        "charts": {}
+                        "charts": {},
+                        "breakdown": {}  # Added to store detailed load components
                     }
                 },
+                "hvac_settings": {  # Added to support hvac_loads.py
+                    "operating_hours": [{"start": 8, "end": 18}],
+                    "system_type": "Default"
+                },
+                "sim_period": {  # Added to support hvac_loads.py
+                    "type": "Full Year",
+                    "start_date": None,
+                    "end_date": None,
+                    "base_temp": 18.3
+                },
+                "indoor_conditions": {  # Added to support hvac_loads.py
+                    "type": "Fixed",
+                    "cooling_setpoint": {"temperature": 24.0, "rh": 50.0},
+                    "heating_setpoint": {"temperature": 20.0, "rh": 50.0},
+                    "schedule": []
+                },
                 "building_energy": {
                     "hvac_type": "",
                     "cop": 0.0,
@@ -341,6 +365,18 @@ class BuildSustain:
                 if key in st.session_state:
                     st.session_state.pop(key, None)
         
+        # Clear HVAC-specific states when leaving the HVAC Loads page (Added to support hvac_loads.py)
+        if previous_page == "HVAC Loads":
+            keys_to_clear = [
+                "hvac_loads_rerun_pending",
+                "hvac_loads_form_state",
+                "hvac_loads_editor",
+                "rerun_trigger"
+            ]
+            for key in keys_to_clear:
+                if key in st.session_state:
+                    st.session_state.pop(key, None)
+        
         # Clear any module-specific rerun flags when changing pages
         st.session_state.module_rerun_flags = {}